C#------ExecuteReader

    class Program
    {
        static void Main(string[] args)
        {
            //连接数据库
            using( MySqlConnection conn = new MySqlConnection("Server=localhost; Database=study; uid=root; pwd=root; Charset=utf8;") )
            //创建数据库对象
            using (MySqlCommand cmd = conn.CreateCommand())
            {
                conn.Open();
                cmd.CommandText = "SELECT * FROM t_customers";
                using (MySqlDataReader read = cmd.ExecuteReader())
                {
                    while (read.Read())//读取每行数据
                    {
                        //获取字段信息
                        int id = read.GetInt32("Id");
                        string name = read.GetString("Name");
                        string age = read.GetString("Age");
                        Console.WriteLine(id + name + age);
                    }
                }
            }
            Console.ReadKey();
        }
    }